EP3874338A1 - Procédé pour faire fonctionner une vanne, unité de pilotage électronique associée et mécanisme d'entraînement de vanne - Google Patents

Procédé pour faire fonctionner une vanne, unité de pilotage électronique associée et mécanisme d'entraînement de vanne

Info

Publication number
EP3874338A1
EP3874338A1 EP19778870.6A EP19778870A EP3874338A1 EP 3874338 A1 EP3874338 A1 EP 3874338A1 EP 19778870 A EP19778870 A EP 19778870A EP 3874338 A1 EP3874338 A1 EP 3874338A1
Authority
EP
European Patent Office
Prior art keywords
valve
function
characteristic curve
heat exchanger
characteristic
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP19778870.6A
Other languages
German (de)
English (en)
Other versions
EP3874338B1 (fr
Inventor
Wolfgang Huber
Adrian Huwiler
Rolf Kunzmann
Karl-Heinz Petry
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens Schweiz AG
Original Assignee
Siemens Schweiz AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens Schweiz AG filed Critical Siemens Schweiz AG
Publication of EP3874338A1 publication Critical patent/EP3874338A1/fr
Application granted granted Critical
Publication of EP3874338B1 publication Critical patent/EP3874338B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
    • F16K37/0075—For recording or indicating the functioning of a valve in combination with test equipment
    • F16K37/0083—For recording or indicating the functioning of a valve in combination with test equipment by measuring valve parameters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
    • F16K37/0075—For recording or indicating the functioning of a valve in combination with test equipment
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
    • F16K37/0075—For recording or indicating the functioning of a valve in combination with test equipment
    • F16K37/0091—For recording or indicating the functioning of a valve in combination with test equipment by measuring fluid parameters
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D7/00—Control of flow
    • G05D7/06—Control of flow characterised by the use of electric means
    • G05D7/0617—Control of flow characterised by the use of electric means specially adapted for fluid materials
    • G05D7/0629—Control of flow characterised by the use of electric means specially adapted for fluid materials characterised by the type of regulator means
    • G05D7/0635—Control of flow characterised by the use of electric means specially adapted for fluid materials characterised by the type of regulator means by action on throttling means

Definitions

  • the present invention relates to a method for operating a valve with an electronically controlled drive unit, in which a non-linear characteristic function is specified, which indicates a required relationship between a valve opening position and the flow of a fluid through the valve. Furthermore, the characteristic function is stored in an electronic control unit of the valve or in a central or higher-level control unit. The stored characteristic function is used to set the valve opening position of the valve depending on a control signal that indicates a target flow through the valve. Furthermore, the invention relates to an electronic control unit according to the preamble of claim 8 and a valve drive according to claim 9.
  • the electronic control unit can e.g. be a microcontroller or microprocessor.
  • a system for controlling the flow properties is known from US 2009/0240376 A1, which system enables a user to selectively change the inherent flow properties of a fluid transmission system which includes a flow control device and a positioner for a control valve.
  • the system includes a programmable flow controller with an input that is adapted to receive an input signal from the flow process controller.
  • the programmable flow control selectively modifies the input signals generated by the flow process control depending on user-definable flow parameters.
  • An output is connected to the programmable flow controller, whereby the output is adapted to transmit output signals to the positioner of the control valve (and the valve connected to it). It is a user interface for entering the custom flow parameters are provided in the programmable flow controller to adapt the input signal to the user-defined flow parameters.
  • a method for regulating flow-dependent control variables is known from EP 0 264 032 A2.
  • flow-dependent control variables are controlled, e.g. of pressure, by means of a control valve, the throttle body of which is changed from a control cylinder connected to a hydraulic control circuit by the addition or removal of hydraulic fluid in its stroke position.
  • a control valve the throttle body of which is changed from a control cylinder connected to a hydraulic control circuit by the addition or removal of hydraulic fluid in its stroke position.
  • certain characteristic curves are created from the control deviation, the time integral and the time differential, and the control deviation is electronically stored in the form of points of the characteristic curves or as coefficients of analytical functions.
  • a device for controlling the control valve of a central heating system which has an electrically controllable actuating device for actuating the control valve and an electrical control device for controlling the actuating device.
  • the control device has a memory in which a valve lift / flow correction characteristic curve is stored. The control device controls the actuating device in such a way that the actuating device adjusts the valve lift of the valve in the sense of a predetermined flow.
  • a parameter that influences the entire course of the characteristic curve as is the case, for example, with thermal loads the case is, in particular with thermal loads in heating / cooling temperature control circuits or such temperature control sections.
  • a method for operating a valve, in particular with an electronically controlled drive unit comprising the steps:
  • the characteristic function is automatically calculated by means of a parameter value, which is given by a user of the valve.
  • the user can specify an analytical function or base values, from which an analytical function can be determined by interpolation. The user therefore only specifies the parameter value and does not need to have any knowledge of the mathematical relationships to determine the characteristic.
  • the user specifies the analytical function or the base values. Simple mathematical knowledge is sufficient for this.
  • the valve can, for example, preferably enter or specify individual functional terms of the analytical function, e.g. via a corresponding user interface, preferably a user interface implemented by means of software on an electronic display unit.
  • the function terms can in particular contain one of the basic mathematical operations, i.e. Plus, minus, multiplication or division. The user could then enter at least one of the following characters: +, -, * or /.
  • the function terms can be entered clearly and correctly using brackets. So round brackets "(" and ")” or square brackets "[", "]” can be entered or specified by the user.
  • the support values can be entered individually by the user, for example in sequence, with only a respective y value or function value being entered.
  • base value pairs that consist of a first value, e.g. x value or definition value and consist of a second value, e.g. y value or function value.
  • a user interface can be provided for entering the function values, preferably a user interface implemented using software on an electronic display unit.
  • non-linear characteristic function enables the valve to be of simple construction, for example a linear or approximately linear characteristic Has. Nevertheless, a suitable characteristic of the nonlinear characteristic function for a nonlinear characteristic of a load, in particular a thermal load, can linearize an overall characteristic of the system of load and valve, which is explained in more detail below using the example of a heat exchanger.
  • the characteristic function can be available as a calculation rule or as a sequence of values or a table of values, i.e. a so-called "look up table".
  • the entire course of the characteristic is influenced by the parameter that the user specifies.
  • all values of the characteristic function to be saved are calculated using the parameter.
  • Intermediate values can later be calculated using spline functions or similar functions, in the simplest case also using linear approximation.
  • the method can be carried out for a line of a control system or control system in which the valve and the load are connected in series. If there are several strands, the procedure can be carried out separately for each relevant strand.
  • the fluid is preferably a liquid, e.g. Water in a heating circuit.
  • the fluid can also be a gas.
  • the parameter value or a parameter value of the analytical function or a parameter value that is used to calculate the support values can be a characteristic value for mathematical modeling of a characteristic curve that is calculated taking into account a characteristic curve for a heat exchanger, the characteristic curve of the heat exchanger preferably being associated with can calculate the same parameter value.
  • the characteristic curve can indicate the relationship between the heating output or the cooling output and the flow of a liquid or a gas through the heat exchanger for the heat exchanger.
  • Heat exchangers are often specifically designed for parameters according to customer requirements.
  • the parameter value can be calculated, for example, from the characteristics of the heat exchanger, for example from the maximum output, inlet temperature and outlet temperature.
  • the heat exchanger can work according to the counterflow principle or the parallel flow principle, which leads to different characteristic curves and thus to different parameter values.
  • the heat exchanger Taking into account the characteristic of the thermal load, i.e.
  • the heat exchanger for example, enables a very good control behavior to be set in a control loop for temperature control. In particular, this can be done by linearizing the overall characteristic and / or by achieving a constant loop gain.
  • the characteristic curve function can be an inverse function, which is determined from a characteristic curve for a heat exchanger and a target function.
  • the characteristic curve for the heat exchanger can indicate the relationship between the heating output or the cooling output and the flow of a liquid or a gas through the heat exchanger.
  • the target function can indicate the relationship between the heating capacity or the cooling capacity of the heat exchanger depending on the valve opening position of the valve.
  • the target function may preferably be a linear function.
  • the characteristic curve for the heat exchanger can be calculated using the same parameter value as the specified or determined characteristic curve function. It may be possible to dispense with the calculation of the characteristic curve for the heat exchanger when carrying out the method, because this characteristic curve is implicitly realized by the heat exchanger and only needs to be known once when the reversing function is defined.
  • the reversing function is thus a desired valve characteristic function, which is carried out by mapping control values for the valve by means of an electronic control unit for a valve or by means of a central control unit.
  • the linear objective function enables light a simple linear control with, for example, constant constant control gain.
  • the valve can have a linear mechanical characteristic curve, where the valve is in particular a globe valve or a slide valve with a geometrically simple valve lifter.
  • the valve is preferably a simply constructed lifting valve with a valve tappet in the form of a cylindrical closing disk, a closing cylinder or a cylinder with an attached frustoconical closing section.
  • the mechanical characteristic curve arises, for example, when the electronic control unit would not take into account a characteristic curve that differs from a characteristic curve specified by the mechanical design of the valve.
  • a non-linear mechanical characteristic curve of the valve can be taken into account, the valve being in particular a ball valve, a throttle valve or a rotary lifting valve. This means that the regulation or control can also be linearized for other valve types.
  • q is the normalized cooling capacity or heating capacity of the heat exchanger, preferably in the range from 0 to 1 and preferably without units,
  • v is the normalized flow through the valve and through the heat exchanger, preferably in the range from 0 to 1 and preferably without units, and
  • a indicates a characteristic value for the modeling of a characteristic curve for one or for the heat exchanger, which is in particular due to the inlet temperatures and the outlet temperatures of the two fluids, e.g. Water and air, possibly also water and water, is defined, which flows through the heat exchanger, a preferably in the range of
  • the valve can preferably be switched upstream or downstream of the heat exchanger.
  • the valve can be a continuously regulating control valve, in particular in a temperature control circuit or in a temperature control section.
  • the valve can contain a magnetic drive unit, an electro-mechanical drive unit, an electro-hydraulic or hydraulic drive unit, an electro-pneumatic or pneumatic drive unit or another drive unit.
  • the electromechanical drive unit can contain an actuator with gear unit.
  • An electronic control device, in particular a magnetic drive unit can convert an actuating signal into a phase-cut power signal, which builds up a magnetic field in a magnetic coil of the magnetic drive unit, so that reliable control results.
  • the stroke resolution of the control valve can be greater than 1: 100, greater than 1: 500 or greater than 1: 900, which justifies, for example, the effort required to adapt the characteristic curve due to very good control properties.
  • the stroke resolution is calculated, for example, from the ratio of the smallest stroke change to the total stroke of the valve in a stroke valve. However, other types of valves can also be used.
  • the valve operating time can be less than 2 seconds or less
  • the characteristic function can be stored in an electronic device, preferably in an electronic storage device, in particular as a calculation rule for an automatically executed program or as a value table in which valve opening positions belonging to flow values or passage openings belonging to valve opening positions flow values are stored, in particular standardized valve opening positions and standardized valve opening positions.
  • the characteristic curve can also be scaled, wherein the externally predetermined working range of the valve can be less than 100 percent of the possible valve opening position of the valve, in particular can be less than 75 percent or less than 50 percent.
  • the actual control value can, for example, be calculated from an externally specified control value by multiplying a percentage that corresponds to the externally specified actuation value based on a mechanically possible maximum valve opening position by a percentage that relates to the externally specified actuation value corresponds to a predetermined actual used maximum valve opening position. This is explained in more detail below with reference to FIG. 3. In this simple way, the dynamic range of the valve and thus the control or regulation can be increased.
  • the parameter can be specified by a user of the valve, in particular using an app that communicates with a server.
  • the parameter can be transmitted from the server to the control unit via a download of the firmware for an electronic control unit for controlling a drive unit of the valve, preferably via a data transmission network.
  • the firmware is, for example, a program that has been programmed to operate a special technical device.
  • the firmware usually controls input and output devices directly, i.e. without using an operating system that would be suitable for controlling the hardware of different manufacturers. Alternatively, another input option for the parameter is used.
  • the method can be carried out for the same valve per year or per day at least twice with different parameter values, in particular automatically. For example, cooling the heat exchanger in summer can be taken into account with a parameter a1 and heating the heat exchanger in winter with a parameter a2. Just- A full load heating in winter with a parameter al and partial load heating in the transition periods with a parameter a2 could be taken into account. Seasonal adjustments and even daytime adjustments of the characteristic curve of the valve are thus possible in a simple manner. An app can be used for the adjustments. Alternatively, the adaptation is carried out in a different way, for example by programming.
  • the parameters can also be specified from a central or higher-level control unit which controls a plurality of valves. At least one of the valves controlled by this control unit can operate according to the method explained above with automatic adaptation of the characteristic curve.
  • the object is achieved by an electronic control unit.
  • the electronic control unit has at least one memory unit in which a program with commands for controlling at least one valve is stored.
  • the at least one processor is designed to load the program from the memory unit and to execute commands of the program.
  • the control unit is designed to control exactly one drive unit of a valve depending on a control signal.
  • the control unit can be designed to control a plurality of valves as a central or higher-level control unit with the aid of a plurality of control signals.
  • the control unit can be suitable for carrying out the method according to the first aspect of the invention, in particular the method according to one of claims 1 to 7, in particular for the method according to claim 6 or 7. "Suitable" means that units are present, who carry out the associated procedural steps.
  • the object is achieved by a valve drive.
  • the valve drive has a drive unit, in particular a magnetic drive unit, an electromechanical drive unit, an electrohydraulic drive unit or a pneumatic drive unit.
  • the valve drive has a control unit according to the invention which is connected to the drive unit by signal or data technology.
  • the components of the valve drive Ven according to the invention can be accommodated in a common housing.
  • a current or voltage supply can be accommodated in the housing of the valve drive at least for the electrical supply of the control unit according to the invention.
  • a hydraulic pump or a pneumatic pump can be accommodated in the housing of the valve drive.
  • control unit according to the second aspect of the invention in which in the control unit a method according to the first aspect the invention and its developments is performed.
  • valve drive according to the third aspect of the invention which comprises a control unit according to the invention.
  • a valve lifter optimization is specified with a V characteristic or flow characteristic that can be dynamically defined in firmware (FW).
  • the globe valve characteristic is currently being determined in the form of complex plunger structures. The development of these plungers is difficult and the production is very complex. Since the valve characteristic curve is determined by the assembly of the valve and the tappet, there is no possibility of being able to change it later without much effort. The valve characteristic was determined by a complex shape or bore in the tappet.
  • the plunger can or no longer has to be a complex structure, but, for example, an easy to manufacture, flat cylinder plunger.
  • This tappet can now be used in all valves regardless of the desired valve characteristic and can be combined with a drive unit with a suitable stroke resolution. Not only can significant savings be made on the tappet side, i.e. for development and / or production, for example, but the valve characteristic curve can also be adapted and dynamically changed in the installed base. There is still the possibility of scaling the characteristic curve for a working range of the valve stroke of less than 100 percent. The dynamic adaptation of the characteristics can never be done by downloading the firmware or in any other suitable way.
  • a geometrically complex closing body can thus be replaced by a "simple" closing body.
  • a desired flow characteristic can be generated via a base interpolation or via mathematical functions in the control unit as part of a valve drive or actuator of the valve. A corresponding resolution of the actuator can be useful.
  • An additional feature could be the input of an a-value to be compensated, i.e. for example a parameter for a heat exchanger characteristic.
  • the user then does not have to derive a valve characteristic from the heat exchanger characteristic or another load characteristic, for example, and then enter it. This work can be performed by the valve actuator or the valve actuator.
  • the change in the characteristic, in particular the valve characteristic can take place, for example, using the BacNet (Building Automation and Control Networks) standard, e.g. with a mobile app.
  • BacNet Building Automation and Control Networks
  • FIG. 2 shows a load characteristic curve, a valve characteristic curve averaged from the load characteristic curve and an overall characteristic curve
  • FIG. 3 shows the process of mapping an external valve manipulated variable to an internal valve manipulated variable and an example of scaling
  • Figure 4 shows a valve insert
  • FIG. 1 shows a building infrastructure 10 which contains the following units:
  • a drive unit 102 of the valve 100 for example a magnetic drive unit, an electromechanical drive unit, e.g. a motor with gear unit, or an electro-hydraulic drive unit,
  • control unit 104 which controls the drive unit 102
  • Reference number 1000 denotes a valve drive which can be attached to valve 100 as a structural unit for setting a valve lift.
  • a valve drive 1000 can also be referred to as an actuator.
  • Such a valve drive 1000 preferably comprises a drive unit 102 accommodated in a housing and a control unit 104 connected to the drive unit 102 in terms of signals and / or data technology.
  • a current or voltage supply for energetically supplying the drive unit 102 can also be accommodated be.
  • the control unit 104 generates, for example, a phase-cut power signal 103 in the case of a magnetic drive unit 102. Alternatively, another control signal can be generated.
  • the control unit 104 receives a control signal 105 from a higher-level control unit or regulating unit, which specifies a control value for the valve 100.
  • the control signal 105 is, for example, a voltage signal in the range from, for example, 0 volts to 10 volts or a current signal, for example in the range from 0 milliamps to 20 milliamps.
  • the ranges can also start at a value other than 0 volts or 0 milliamperes, for example at 2 volts or at 4 milliamperes.
  • the control unit 104 can be implemented as pure hardware or circuitry.
  • the control unit 104 can contain a data memory M1 for program data and for working data and a processor PI which, when executing the method steps explained below, processes program instructions which are stored in the memory M1.
  • the building infrastructure 10 also includes a server 150, ie an electronic data processing system, on which at least one service provision program is stored.
  • the server 150 can contain a data store M2 for program data and for work data, as well as a processor P2, which executes program instructions which are stored in the store M2 when executing the method steps explained below.
  • the server 150 can also be implemented only by means of hardware or circuit technology.
  • the control unit 104 and the server 150 can be connected via a data transmission network 160, for example via the Internet or via a company network which operates, for example, according to the Internet protocol IP.
  • a data transmission network 160 for example via the Internet or via a company network which operates, for example, according to the Internet protocol IP.
  • a reversing function is stored in the control unit 104 or alternatively in the higher-level control, see FIG. 2, reversing function 230.
  • a user of valve 100 can specify a parameter a, which will be explained in more detail below.
  • the specification can be made, for example, via a service usage program, or app for short, which works with a corresponding service delivery program on the server 150.
  • parameter a can be transmitted to server 150 via data transmission network 160 or another data transmission network.
  • the user can also specify several parameters al, a2, etc. and possibly also times at which these parameters are to be used, for example months, days or even hours.
  • the parameter a is then taken into account in the inverse function 230, for example by storing it in a firmware via a calculation rule for the characteristic curve 230 or by storing values which are calculated according to the calculation rule using the parameter a. have been net by the service provider program or by another program to which the parameter a has been transmitted by the service provider program with which the user communicates.
  • the firmware in the control unit is updated, for example, by means of a download.
  • parameter a can also be entered directly into control unit 104 or the higher-level control unit.
  • the firmware is then adapted accordingly and can take variable parameters a into account itself.
  • the higher-level controller can update the firmware.
  • valve 100 are operated using the reverse function 230 calculated with the parameter a, see FIG. 2.
  • This procedure allows a simply constructed valve 100 to be used, the valve tappet of which is based on FIG. 4 is explained in more detail.
  • the linearization of the overall characteristic of the system consisting of valve 100 and heat exchanger 110 can be implemented in a simple manner.
  • the entire load characteristic or the reversing function can also be predefined by a user of valve 100.
  • base values for this function or for these functions can be specified by a user of valve 100, from which the required function can then be calculated or the required function values can be calculated by interpolation.
  • FIG. 2 shows in a coordinate system 200 a load characteristic curve 220 for the heat exchanger 110, a valve characteristic curve or reversal characteristic curve 230 for the valve 100 determined from the load characteristic curve 220 and an overall characteristic curve 210 (target function) for the overall system of valve 100 and heat exchanger 110.
  • the coordinate system 200 has an x-axis 202 on which the flow through the heat exchanger 110 is shown normalized in the range from 0 to 1 for the characteristic curve 220.
  • the stroke is standardized on the x-axis 202 and shown in the range from 0 to 1.
  • the normalization can follow maximum values for the stroke, the flow or the power.
  • the heat exchange capacity for example a heating capacity or a cooling capacity, is again normalized for the heat exchanger 110 and shown in the range from 0 to 1.
  • the flow for the valve is shown on the y-axis 204, in particular standardized and in the range from 0 to 1. Because of the series connection of valve 100 and heat exchanger 110, the flow of the fluid, in particular water, through both units is the same , which makes the representation in a coordinate system 200 meaningful.
  • the x-axis denotes the normalized flow through the valve 100 or through the heat exchanger 110 in the range from 0 to 1 and the y-axis denotes the normalized output of the heat exchanger 110 in the range of 0 to 1.
  • the reversing function 230 is determined on the basis of the characteristic curve 220 in such a way that a linear or approximately linear overall characteristic curve 210 results. This can be done graphically, using calculation rules or formulas, as explained in more detail below, or in another suitable manner.
  • the characteristic curve for the heat exchanger 220 was determined, for example, using the following formula:
  • q is the normalized cooling capacity or heating capacity of the heat exchanger 110, preferably in the range from 0 to 1 and preferably without units
  • v is the normalized flow through the valve 100 and through the heat exchanger 110, preferably in the range from 0 to 1 and preferably without units
  • a specifies a characteristic value for the modeling of a characteristic curve for the heat exchanger 110, which is determined in particular by the inlet temperature and the outlet temperature of a fluid which flows through the heat exchanger 110, wherein a is preferably in the range from 0 to 1 and is preferably unitless.
  • the reversing function 230 is determined from the characteristic curve 220 by, in the case of a linear characteristic curve of the valve 100, i.e. Characteristic curve without specifying a separate characteristic curve for valve 100, mirroring of characteristic curve 220 at target characteristic curve 210 or target function is carried out, for example in a graphic manner or by calculation using a mathematical program.
  • the curve / characteristic curve of the reversing function 230 or the characteristic curve function 230 results from:
  • q is the normalized cooling capacity or heating capacity of the heat exchanger 110, preferably in the range from 0 to 1 and preferably without units,
  • v is the normalized flow through the valve 100 and through the heat exchanger 110, preferably in the range from 0 to 1 and preferably without units, and
  • a specifies a characteristic value for the modeling of a characteristic curve for the heat exchanger 110, which is determined in particular by the inlet temperature and the outlet temperature of a fluid which flows through the heat exchanger 110, wherein a is preferably in the range from 0 to 1 and is preferably unitless.
  • the characteristic curve 230 can be stored or stored in the firmware of the control unit 104 for specific parameters a or as a general calculation rule. If specific values are determined from the characteristic curves 230 and 220, the characteristic curve 210 results. belongs to the stroke 0.8 according to characteristic curve 230, a flow through the valve 100 of approximately 0.3 on the y-axis. For the flow rate of 0.3 on the x-axis for the heat exchanger 110, the characteristic curve 220 results in a heat exchanger output of approximately 0.8 on the y-axis. The stroke value 0.8 thus includes the power value 0.8 for the overall characteristic curve 210.
  • a linear characteristic for valve 100 was assumed when defining characteristic 230. However, it is also possible to take slightly different non-linear or strongly non-linear characteristic curves of valves of certain designs into account.
  • FIG. 3 shows the process of mapping an external valve manipulated variable of valve 100 to an internal valve actuated variable and an example of scaling.
  • a coordinate system 300 shows the reversing function 230.
  • the x-axis 302 of the coordinate system 300 denotes the normalized stroke of the valve 100 in the range from 0 to 1 for the reversing function 230.
  • the y-axis 304 of the coordinate system 300 denotes the standardized flow through the valve 100 in the range from 0 to 1.
  • the normalization can take place to maximum values for the stroke or the flow.
  • a coordinate system 350 is shown to the left of the coordinate system 300, which shows the linear valve characteristic 360 of the valve 100, which due to its structure has caused the control unit and not the superordinate unit not to make any corrections to the characteristic.
  • the valve characteristic curve 360 of the valve is linear in the example. In other examples, the valve characteristic curve of the valve 100 is nonlinear even without corrections, see, for example, characteristic curve 370.
  • the characteristic curve 370 is then taken into account instead of the characteristic curve 360 when determining the reversing function in such a way that the target function 210, see FIG. 2, is again linear or has another desired or required course.
  • the x-axis 352 of the coordinate system 350 designates the normalized stroke of the valve 100 in the range from 0 to 1 for the valve characteristic 360 or 370.
  • the y-axis 354 of the coordinate system 350 designates the normalized flow through the valve 100 in the range of 0 to 1. The normalization can take place at maximum values for the stroke or the flow.
  • the control unit 104 leads to the realization of the characteristic curve 230, i.e. the reversal function, a mapping or mapping from external control values (control signal 105) to valve-internal control values (control signal 104) by what a value is explained below. If, for example, the standardized external control value (control signal 105) for the stroke of the valve is 0.8, the control unit uses the characteristic curve 230 stored in the control unit 104 to determine the flow value of approx. 0.3, see arrows 380 and 382. With this flow value 0.3, the control unit 104 then determines an associated stroke value of the valve 100 from the characteristic curve 360.
  • the characteristic curve 360 can also be stored in the control unit.
  • a stroke of 0.3 also follows from the characteristic curve 360, which is then used as the value to be set on the valve 100, i.e. realized in signal 103, see arrow 384.
  • the control unit can also use the flow value on the x-axis 304 directly as a value for the stroke.
  • the mapping function can only be carried out with reference to the coordinate system 350 if the valve characteristic 370 is not linear.
  • the maximum manipulated value is, for example, only 75 percent, for which the reference symbol S75 is used.
  • mapping of manipulated values and scaling can also be carried out in combination.
  • FIG. 4 shows a valve insert 400 of the valve 100.
  • Valve insert 400 contains from bottom to top in the following order:
  • End section 460 the diameter of which is larger than the diameter of the fastening section 450.
  • valve lift H lies between an opening position of the bottom of the frustoconical tappet section 410 and a valve opening, not shown, of the valve 100.
  • the valve insert 400 is simple in construction and can be manufactured at low cost.
  • the valve insert 400 results in a linear characteristic curve 360 without additional measures.
  • each characteristic curve can be realized with the valve 100 using the valve insert 400 if the procedure is as it is has been explained above.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Flow Control (AREA)
  • Magnetically Actuated Valves (AREA)

Abstract

L'invention concerne un procédé pour faire fonctionner une vanne (100) avec une unité d'entraînement (102) à pilotage électronique, comprenant les étapes suivantes : - Détermination ou spécification d'une fonction de courbe caractéristique non linéaire (230) qui indique une relation exigée entre une position d'ouverture de la vanne (H) et le débit d'un fluide à travers la vanne, - Stockage de la fonction de courbe caractéristique (230) dans une unité de pilotage électronique (104), - Utilisation de la fonction de courbe caractéristique pour régler la position d'ouverture de la vanne en fonction d'un signal de commande (105) pour un débit de consigne de la vanne. La fonction de courbe caractéristique est calculée automatiquement au moyen d'une valeur de paramètre (a), d'une fonction analytique ou par interpolation avec des valeurs de référence prédéterminées qui sont prédéfinies par un utilisateur de la vanne. Le procédé est caractérisé en ce que : la fonction de courbe caractéristique est une fonction d'inversion déterminée à partir d'une courbe caractéristique (220) pour un échangeur de chaleur (110) et d'une fonction objective (210) ; cette courbe caractéristique (220) indique la relation entre la puissance de chauffage ou de refroidissement et le débit d'un liquide ou d'un gaz à travers l'échangeur de chaleur ; la fonction objective indique la relation entre la puissance de chauffage ou la puissance de refroidissement de l'échangeur de chaleur en fonction de la position d'ouverture de la vanne ; la fonction objective est de préférence linéaire ; et la courbe caractéristique de l'échangeur de chaleur peut de préférence être calculée avec la même valeur de paramètre que la fonction de courbe caractéristique prédéfinie ou déterminée.
EP19778870.6A 2018-10-29 2019-09-17 Procédé de fonctionnement d'une soupape, unité de commande électronique associée et entraînement de soupape Active EP3874338B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP18203215.1A EP3647899A1 (fr) 2018-10-29 2018-10-29 Procédé de fonctionnement d'une soupape, unité de commande électronique associée et entraînement de soupape
PCT/EP2019/074828 WO2020088831A1 (fr) 2018-10-29 2019-09-17 Procédé pour faire fonctionner une vanne, unité de pilotage électronique associée et mécanisme d'entraînement de vanne

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EP3874338A1 true EP3874338A1 (fr) 2021-09-08
EP3874338B1 EP3874338B1 (fr) 2022-06-08

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EP18203215.1A Withdrawn EP3647899A1 (fr) 2018-10-29 2018-10-29 Procédé de fonctionnement d'une soupape, unité de commande électronique associée et entraînement de soupape
EP19778870.6A Active EP3874338B1 (fr) 2018-10-29 2019-09-17 Procédé de fonctionnement d'une soupape, unité de commande électronique associée et entraînement de soupape

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US (1) US11828384B2 (fr)
EP (2) EP3647899A1 (fr)
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DE102020209046A1 (de) * 2020-07-20 2022-01-20 Siemens Aktiengesellschaft Verfahren zum Steuern von Wärmeaustauschen zwischen mehreren Energiesystemen sowie Steuerungsplattform
DE102020127383A1 (de) 2020-10-16 2022-04-21 Bucher Hydraulics Gmbh Vorsteuergerät für mindestens einen Ventilantrieb eines Hydraulikventils und Verfahren zu deren Betrieb

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DE3633852A1 (de) * 1986-10-04 1988-04-07 Bopp & Reuther Gmbh Verfahren zum regeln von durchflussabhaengigen regelgroessen
DE4019503A1 (de) 1990-06-19 1992-01-02 Heimeier Gmbh Metall Theodor Einrichtung zur steuerung des stellventiles einer zentralheizungsanlage
US5549137A (en) * 1993-08-25 1996-08-27 Rosemount Inc. Valve positioner with pressure feedback, dynamic correction and diagnostics
US7769493B2 (en) * 2008-03-19 2010-08-03 King Fahd University Of Petroleum And Minerals System and method for controlling flow characteristics
US20110114304A1 (en) 2008-07-25 2011-05-19 Belimo Holding Ag Method for the hydraulic compensation and control of a heating or cooling system and compensation and control valve therefor

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EP3874338B1 (fr) 2022-06-08
US11828384B2 (en) 2023-11-28
EP3647899A1 (fr) 2020-05-06
WO2020088831A1 (fr) 2020-05-07
US20220003335A1 (en) 2022-01-06
CN112912812A (zh) 2021-06-04

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